I recommend finding the trailhead by using the directions function on the app, which takes you to the trailhead on Ridge Road. There is a wide spot in the road at the start of the trailhead where two cars could probably fit. The trail goes through a maritime forest and is easy to follow to the sound, which is a short side trail out and back from the main trail. The sound is hard to see but you can see parts of it and the Wright Memorial Bridge.

If you continue going north on the trail once you have returned from the sound view side trail you will come to a wooden gate. Heading north past the wooden gate the trail is not marked and becomes nonexistent at parts. You will eventually come to a road and if you follow the road and plunge back into the forest where the gps map says you should, you will eventually come back to another wooden gate where the trail picks up again and is better marked. That trail will lead you around the loop and back to the trailhead. That said, I recommend not treating this as a loop trail but instead as a couple of out and back trails and turning around once you come to the wooden gates.